head to head · open source
Open WebUI vs pentestagent
Open WebUI has 157,575 GitHub stars, 22,923 forks, 294 open issues and last shipped yesterday. pentestagent has 3,232 stars, 644 forks, 30 open issues and last shipped yesterday. Open WebUI leads on adoption by 4,775% (157,575 vs 3,232 stars). Open WebUI is written in Python under a custom or non-standard licence; pentestagent is written in Python under MIT. Open WebUI has attracted 15% as many forks as stars, pentestagent 20%. Open WebUI was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai, llm), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Open WebUI | pentestagent | |
|---|---|---|
| GitHub stars | ★ 158K | ★ 3.2K |
| License | Custom / other | MIT |
| Written in | Python | Python |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 23K | ⑂ 644 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Open WebUI if
- You weight community size — 158K stars and counting
- You want the Custom / other license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick pentestagent if
- You want the pentestagent feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and pentestagent fits your workflow better
About Open WebUI
Open WebUI 👋 Open WebUI is a home for AI , a self hosted AI platform that's extensible , feature rich , user friendly, and built to run entirely offline . With support for Ollama and OpenAI compatible APIs , it gives you a powerful, provider agnostic interface for both local and cloud based models. Passionate about open source AI? Join our team → [!TIP] Looking for an Enterprise Plan? – Speak with Our Sales Team Today! For more information, be sure to check out our Open WebUI Documentation. Key Features of Open WebUI ⭐ 🚀 Effortless Setup : Install seamlessly via pip, uv, Docker, or Kubernetes (kubectl…
read the full Open WebUI overview →
About pentestagent
PentestAgent AI Penetration Testing Requirements Python 3.10+ API key for OpenAI, Anthropic, or other LiteLLM supported provider Install Configure Create .env in the project root: Or for OpenAI: Any LiteLLM supported model works. Using a relay / custom API base Point PentestAgent at any OpenAI compatible endpoint via OPENAI API BASE : For Anthropic compatible endpoints use ANTHROPIC API BASE instead. See .env.example for full provider notes and embedding options. Run Docker Run tools inside a Docker container for isolation and pre installed pentesting tools. Option 1: Pull pre built image (fastest) Option 2…
read the full pentestagent overview →
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Frequently asked questions
Is Open WebUI or pentestagent more popular?
Open WebUI has 157,575 GitHub stars and pentestagent has 3,232. Open WebUI has the larger community by that measure.
Are Open WebUI and pentestagent free?
Both are open source. Open WebUI has no licence declared in this registry, and pentestagent is licensed under MIT. Both are free to self-host.
What is the difference between Open WebUI and pentestagent?
Open WebUI is written in Python and pentestagent in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Open WebUI or pentestagent?
Choose Open WebUI if you want the larger community (157,575 stars) or its Custom / other licence terms. Choose pentestagent if its feature set, stack or MIT licence fits better. Both are self-hostable.